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>> restarted the storage
Was your Netgear restarted properly or was the power unplugged maybe? If it was unplugged and powered on again, the Netgear will start checking the discs, this can take a long time. Your Raidar application will mention this as well.

This was did by my colleague when i was on leave. He said he just restarted the device. After that all this happened. But he can see all the green lights blinking on the front panel of the device. But when he opens the raidar he can see orange light indicating in volume.

Please mention what shall i do for the troubleshooting as tomorrow i will be joining.
This issue started five days before.

This is about the 'home' model Netgear 4200, right, not the rackmount device?

The 'home' model has led's on the top part of the device and a door that opens to reveal 4 hard drive casings that are vertitally mounted. I don't know of any led's inside that model.

On the other hand, amber led's in a Netgear NAS mean that that drive has failed and should be replaced. Do you know what RAID configuration you have, what the each HD size is and what the net available storage is?

<EDIT>What happens if you press the 'setup' button in Raidar? It should redirect you to the Netgear's webpage.

This is not a home model . Its a rack mountable with four hard disks. But in front of the device all the lights are green. But previously also when one hard disk failed i was still able to browse don't know what happened this time. I can give you a clear scenario tomorrow only .

Ok, so the rack mount model. The fact that it isn't accessible is probably bad news. Has that failed disc been replaced before or is it still in?

Even with one failing disc, a bit depending on your RAID setup, it should boot up and Raidar should notify you that the device has degraded, mark the failed disc etc. The fact that it doesn't now could mean that 2 discs have failed.

As for trouble shooting: you should have an empty spare disc to replace a failed disc, assuming only one disc has failed.

In case 2 discs have failed, I'd suggest you power down and startup the storage again and watch what led's are green, if any (how many) turn amber. It may become accessible again, or not of course.

In case one disc has failed: find out which disc, replace it with the empty disc. No powerdown needed, discs are hot swappable.

Last question: why was the device restarted and how was the restart performed?

I had that problem with a Netgear managed switch. I was using IE10. I went to Firefox and that worked perfect. You might want to try a different browser. Also you might need to use https:// with a different browser to access it.

Attached is the snapshot of the Nas storage via Raidar. Also when i press setup it shows page cannot be displayed. But i can ping the device by IP . Also when i typed Https://192.168.10... its not opening up.

I restarted the device & now it shows amber light in front of HDD 1. I can ping the device but still unable to browse. By replacing HDD1 will it work. Previously when one hdd failed i was still able to browse.

There are total four hard disks in the storage . I removed all & tried to browse, it was not browsing. even it was not pinging at that time . Then i removed only the faulty hdd & inserted the remaining hdd's in the same slots , it was pinging but not browsing.

I'm traveling atm, can respond later today. Replacing the faulty drive should have made the device available again. Can you try and access the default webpage? I believe it's https://192.168.1.1 (look in the manual to be sure). Get back to you later.

I see the device's address is 192.168.10.95 - can you get a laptop with a network cable and connect that directly to the Netgear? You have to manually configure the network card on the laptop manually to an address in the same range, for example 192.168.10.10 ? Disable firewall on the laptop and antivirus (temporarily) and see if you can connect. Meanwhile I'll try and figure out what the amber status means exactly, your device behaves different than expected (as you know already by now).

I did what you mentioned above i.e. connected my system directly with the device & checked . It is pinging but not browsing. Even in dns i checked the ip belongs to the same device.

As i mentioned yesterday amber light is showing in front of bay 1(HDD). the device does not have front panel display , so how will i perform the steps mentioned in above link No i didn't contacted Netgear support.

Hi, the 'panel' I was talking about is the panel you see in the Raidar application, from the picture you've uploaded (Nas-Error.jpg). That same picture is showing 4 green HD led's which doesn't match the physical leds at the HDD bays. Do you have one or more of these Netgear devices? Could it be that Raidar is detecting another Netgear than the one you are looking at? If you have one Netgear device with 4 HDD and 1 HDD marked bad and Raidar not detecting the bad HDD then I suggest you contact Netgear because I can't explain this and would be contacting Netgear myself. So the bottom LED of HDD1 is amber, right? If so, did you replace that hdd with a new, empty drive?

Thanks for your reply. There is no other netgear device other than this. In front panel bay 1 its showing amber sign. even i did the resetting , got the default ip i.e.192.168.168.168. After this i directly connected the device to my pc . It can ping but can't browse.

Attached is the snapshot. But towards the left side of the snapshot there is also amber sign. why it is indicating towards the left. If i replace faulty hdd with the new one will i be able to browse.

>> If i replace faulty hdd with the new one will i be able to browse
I though you've already replaced the faulty one with a new one?

From the description of the boot menu:

Skip volume check. After a system crash, the system tries to scan and fix the volume using a file system check. If several problems are found on a disk, this process can stall, causing the system not to boot. Use this option to skip the scan and let the system boot. WARNING! Use the skip volume check boot mode only when instructed to do so by a NETGEAR Technical Support representative, otherwise data loss might occur.

Looks to me like you've got several problems causing the system not to boot. Skipping volume check is not advised without consulting NG tech support.